Add upload ability to my own website - need code to use to call upload script with parameters for pictures etc

Hi,

I'm wanting to add images to my gallery website, but without having to login to the gallery account and choose the add image button etc.

Basically, does anybody have the code that I can use to call the upload script which adds images to an album.

I see the process as:
call login script with user name and password
call upload script with picture objects as parameters
call logout script

Please correct my assumptions if incorrect.